JJF(浙) 1195-2023 60°密封管螺紋量規(guī)校準規(guī)范

U浙)JJF(浙)1195-2023CalibrationSpecificationf2023-04-17發(fā)布2023-07-17實施JJF（浙）1195—2023JJF（浙）1195—2023I 4 4 4 本規(guī)范依據(jù)JJF1071-2010《國家計量校準規(guī)范編寫規(guī)則》、JJF1001-2011《通用計量術(shù)語及定義》和JJF1059.1-2012《測量不確定度評定與表示》進行編JJF（浙）1195—2023160°密封管螺紋量規(guī)校準規(guī)范在圓錐表面上所形成的具有相同牙型、沿螺在中徑圓錐上，兩個位置的直徑差與這兩個位置NPT圓錐螺紋量規(guī)是對60°密封管螺紋要素尺寸邊界條件進行綜合檢驗的計量器具，用于控制60°密封管螺紋要素的極限尺寸。其主要特征為牙型角呈2國標：NPT1/4-18LH(美標1/4-18NPTLH),沒有“LH”的代NPT1/4,NPT1/4-18。JJF（浙）1195—20233表1計量特性及符號參數(shù)名稱符號參數(shù)名稱符號基面大徑基面小徑基面中徑??中徑圓錐錐度牙側(cè)角α?,??牙型角α螺距基準距離?表2環(huán)境溫度及被測量規(guī)與校準用設備溫差要求測量范圍室內(nèi)溫度對20℃的允許偏差/℃平衡溫度的時間/h≤100mm±22>100mm±13表3被校參數(shù)、標準器名稱及主要技術(shù)參數(shù)被校參數(shù)標準器名稱及主要技術(shù)參數(shù)基面大小徑螺紋綜合測量機MPE:±(3+/200)μm萬能工具顯微鏡MPE:±(1+/200)μm基面中徑、中徑圓錐錐度、螺距螺紋綜合測量機MPE:±(3+/200)μm測長儀MPE:±(1+/200)μm+T形球探針、量針（直徑測量不確定度≤0.5μm）牙側(cè)角螺紋綜合測量機MPE:±1′、萬能工具顯微鏡MPE:±1′JJF（浙）1195—20234基準距離數(shù)顯測高儀MPE:±(2+/300)μm、1級平板b)用標準環(huán)規(guī)按式（2）對T型測頭的K值進行校準，校準時T型測頭的5c)在保留全部螺紋牙槽的范圍內(nèi)，確定基面所在的被測牙槽和被測直徑方紋軸向位移示值Z?和T型測頭螺紋軸向浮動位移示值Zs。d)若基面處只能在螺紋一側(cè)測量而另一側(cè)牙槽已不存在，選擇盡可能接近基面且兩側(cè)均可測量的被測牙槽i(由基面所在牙槽0起向小端面數(shù)第i個牙槽),將量球置于被測牙槽i內(nèi)，分別測量和記錄測長儀測量示值X、工作臺螺紋軸向被測牙槽0和螺紋另一側(cè)+0.5P牙槽內(nèi)(圖4.1),分別測量和記錄測長儀測量值Z。。若基面處螺紋兩側(cè)均可測量，被測牙槽i即為基面所在牙槽(圖4.2),此時i=0,X;=Xo,Xi+0.5P=Xo+0.5P,Xi-0.5p=Xo-0.5p,Zi=Zo,Zi=Z?。JJF(浙)1195—20236mK圖4.2量球法測量外螺紋基面中徑圖4.3量球法測量外螺紋的軸向平面圖基面中徑按式(3)計算。JJF（浙）1195—20237——從基面到小端面的軸向距離；T——圓錐螺紋中徑圓錐的錐度。?????（4）?t???t?t??h??6）——在測量平面內(nèi)，測量線與牙側(cè)線交點到螺紋軸線的徑向距離；i=1表），）； tttXttt?——量球（針）直徑；——量球與被測牙槽i+0.5P接觸，測長儀的——量球與被測牙槽i-0.5P接觸，測長儀的測量示值；JJF（浙）1195—20238——T型測頭的K值；——T型測頭的K值；使用螺紋綜合測量儀測量時，端面的位置使用基面規(guī)標定獲得，對于NPT塞規(guī)，由端面往大端偏移一個基準距離，即是基面；對于NPT環(huán)規(guī)，大端面就圖5二維輪廓掃描法測量外螺紋基面中徑9基面中徑按公式(9)～(15)計算。????t?tXt?tXXttt?t??螺距測量可采用二維輪廓掃描法進行測量。也可采用量球法等其他滿足測量準確度要求的方法。螺距測量應盡可能在螺紋全長上至少JJF（浙）1195—2023JJF（浙）1195—2023表A螺紋工作量規(guī)的基本尺寸單位：mmh?面面面面面面面面270.9414.0647.4397.6937.8546.8887.3036.3376.591270.9414.1029.78510.04110.2039.2339.4899.6528.6828.9381.4115.78613.04013.40213.67812.48712.76411.21111.5733/81.4116.09616.45916.84015.54515.92614.63115.0121.81420.47220.98021.32019.26419.77218.05618.5643/41.8148.61125.78726.32626.65424.57925.44523.37123.90912.20932.29732.93233.38130.82631.46131.91029.35529.9902.20910.66841.02241.68942.14439.55140.21840.67338.08038.7472.20910.66847.09247.75848.24045.62146.28746.76944.15044.81622.20911.07459.79660.30557.63358.32558.83456.8542?817.32371.19172.27372.99769.07670.15970.88266.96268.0443819.45686.96788.87284.85286.06886.75782.73783.9533?820.85399.587100.891101.57297.47398.77699.45795.35896.6614821.438112.208113.548114.272110.093111.433107.978109.3185823.800139.039140.527141.272136.925138.412134.810136.2976824.333165.845167.366168.247163.731165.252161.6168827.000216.328218.015219.047214.213215.901216.932212.099213.786830.734269.966271.886273.022267.851269.772270.907265.736267.657834.544320.448322.607323.822318.333320.492321.707316.219318.378839.675352.000354.479355.572349.885352.365353.457347.770350.250846.025402.482405.359406.372400.368403.244404.257398.253401.130850.800452.965456.140457.172450.850454.025455.057448.735451.91020853.975503.447506.821507.972501.333504.706505.857499.218502.59124860.325604.412608.182609.572602.298606.068607.457600.183603.953表B螺紋工作量規(guī)的尺寸偏差單位：mm螺紋尺寸代號牙數(shù)塞規(guī)環(huán)規(guī)基面±基面大徑-螺距±錐度+半角±基準距離-基面小徑+螺距±錐度-半角±基準距離+校對規(guī)基面平齊±270.0050.0100.0050.0080.0250.0100.0080.015200.0250.051270.0050.0100.0050.0080.0250.0100.0080.015200.0250.0510.0050.0150.0050.0100.0250.0150.0080.018200.0250.0513/80.0050.0150.0050.0100.0250.0150.0080.018200.0250.0510.0080.0250.0050.0150.0250.0250.0080.0230.0250.0513/40.0080.0250.0050.0150.0250.0250.0080.0230.0250.05110.0080.0250.0080.0200.0250.0250.0100.0300.0250.0510.0080.0250.0080.0200.0250.0250.0100.0300.0250.0510.0080.0250.0080.0200.0250.0250.0100.0300.0250.05120.0080.0250.0080.0200.0250.0250.0100.0300.0250.0512?80.0130.0410.0100.02570.0510.0410.0130.0360.0510.076380.0130.0410.0100.02570.0510.0410.0130.0360.0510.0763?80.0130.0410.0100.02570.0510.0410.0130.0360.0510.076480.0130.0410.0100.02570.0510.0410.0130.0360.0510.076580.0130.0410.0100.02570.0510.0410.0130.0360.0510.076680.0130.0410.0100.02570.0510.0410.0130.0360.0510.076880.0130.0510.0100.02570.0510.0510.0130.0360.0510.07680.0130.0510.0100.02570.0510.0510.0130.0360.0510.07680.0130.0510.0100.02570.0510.0510.0130.0360.0510.07680.0200.0760.0130.02570.0510.0760.0130.0360.05180.0200.0760.0130.02570.0510.0760.0130.0360.05180.0200.0760.0130.02570.0510.0760.0130.0360.0512080.0200.0760.0130.02570.0510.0760.0130.0360.0512480.0200.0760.0130.02570.0510.0760.0130.0360.051*在基準距離L1范圍內(nèi)的中徑圓錐錐度。計算獲得基面中徑值。取各組計算數(shù)據(jù)均值為錐管螺?t（C.1）式中:?——錐管螺紋塞規(guī)基面中徑值；t——儀器上被測錐管螺紋塞規(guī)基面中徑測得值。表A.1實驗數(shù)據(jù)和實驗結(jié)果（單位：mm）3/4-14NPT管螺紋塞規(guī)次數(shù)12345讀數(shù)值25.119825.119825.119825.119725.1197次數(shù)6789讀數(shù)值25.119725.119725.119725.119725.1194平均值25.119701-111/2NPT錐管螺紋環(huán)規(guī)次數(shù)12345讀數(shù)值31.474631.474831.475031.475031.4751次數(shù)6789讀數(shù)值31.475031.475131.474831.474831.4750平均值31.47492????螺紋綜合測量儀的外尺寸最大允許誤差MPE:±(2.5+/200)μm，內(nèi)尺寸最大????????????tt?ο?——分別是被測錐度螺紋塞規(guī)線膨脹系數(shù)?、螺紋綜合測量儀光柵尺的線根據(jù)光滑塞規(guī)、光滑環(huán)規(guī)校準報告，標稱直徑L<50mm的擴展不確定度JJF（浙）1195—2023?JJF（浙）1195—2023表A.2標準不確定度一覽表錐螺紋塞規(guī)不確定度來源標準不確定度(μm)重復性引入的標準不確定度??t0.116標準器引入的標準不確定度??t由溫度差引入的標準不確定度分量??t0.106光滑塞規(guī)引入的標準不確定度分量??t0.250錐螺紋環(huán)規(guī)重復性引入的標準不確定度??t0.161標準器引入的標準不確定度??t由溫度差引入的標準不確定度分量??t0.132光滑環(huán)規(guī)引入的標準不確定度分量??t0.250tt?tt?tt?t=1.545μm（C.10）tt?tt?tt?t=1.852μm（C.11）C.2使用測長儀測量NPT錐螺紋塞規(guī)的測??4μmC.2使用測長儀測量NPT錐螺紋塞規(guī)的測?tt?ttJJF（浙）1195—2023考慮各分量間彼此相互獨立，依據(jù)間接測量????t?t?t?t?Tt??t?定??t?影響錐管螺紋塞規(guī)基面中徑測量結(jié)果的主要因素有測長儀引入分量和測球tt?tt?tt選擇規(guī)格：NPT3/4-14型號美制圓錐螺紋塞規(guī)進行10表A.1實驗數(shù)據(jù)和實驗結(jié)果(單位：mm)次數(shù)12345讀數(shù)值25.119825.119825.119825.119725.1197次數(shù)6789讀數(shù)值25.119725.119725.119725.119725.1194JJF（浙）1195—2023平均值25.11970?(m)?0.116μm（C.17）?測長儀進行測量時，控制每次測量時測力為0.3N左右，測量力變